CSA Backup & Disaster Recovery 2 — Questions and Answers
Question 1: What does RTO stand for in disaster recovery planning?
- Recovery Time Objective (Correct answer)
- Restore Transfer Operation
- Recovery Transfer Output
- Redundant Time Override
Correct answer: Recovery Time Objective
RTO (Recovery Time Objective) defines the maximum acceptable downtime before business operations must be restored after a disaster.
Question 2: Which backup strategy involves copying only the data that has changed since the last full backup?
- Mirror backup
- Differential backup (Correct answer)
- Incremental backup
- Snapshot backup
Correct answer: Differential backup
A differential backup copies all data changed since the last full backup, making restoration faster than incremental since only the full and latest differential are needed.
Question 3: What is the primary purpose of a hot site in disaster recovery?
- To store archived data at low cost
- To provide a fully operational duplicate environment for immediate failover (Correct answer)
- To test backup integrity monthly
- To offload read traffic from the primary server
Correct answer: To provide a fully operational duplicate environment for immediate failover
A hot site is a fully equipped, continuously running duplicate facility that allows near-instant failover when the primary site goes down.
Question 4: A company performs a full backup every Sunday and incremental backups daily. If disaster strikes Thursday, which backups are needed to restore?
- Sunday full only
- Sunday full + Thursday incremental only
- Sunday full + Monday, Tuesday, Wednesday, and Thursday incrementals (Correct answer)
- Thursday incremental only
Correct answer: Sunday full + Monday, Tuesday, Wednesday, and Thursday incrementals
Incremental restores require the last full backup plus every incremental backup taken since, making the process longer but storage-efficient.
Question 5: What does RPO measure in a disaster recovery plan?
- How fast systems restart after failure
- The maximum tolerable data loss measured in time (Correct answer)
- The cost of replacing failed hardware
- The number of redundant servers required
Correct answer: The maximum tolerable data loss measured in time
RPO (Recovery Point Objective) defines the maximum age of data that must be recovered, determining how frequently backups must occur.
Question 6: Which RAID level provides disk mirroring without parity, offering full redundancy?
- RAID 0
- RAID 1 (Correct answer)
- RAID 5
- RAID 6
Correct answer: RAID 1
RAID 1 mirrors data across two drives so that if one fails, the other contains an identical copy, providing full redundancy.
Question 7: What is the 3-2-1 backup rule?
- 3 full backups, 2 offsite, 1 encrypted
- 3 copies of data, on 2 different media types, with 1 copy offsite (Correct answer)
- 3 daily backups, 2 weekly, 1 monthly
- 3 servers, 2 data centers, 1 cloud provider
Correct answer: 3 copies of data, on 2 different media types, with 1 copy offsite
The 3-2-1 rule recommends keeping 3 copies of data on 2 different storage media with at least 1 copy stored offsite for robust protection.
CSA Backup & Disaster Recovery 2
What does RTO stand for in disaster recovery planning?